完全用代码实现ListView,不涉及任何xml的layout

package com.pekall;

import java.util.ArrayList;

import android.app.Activity;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Bitmap.Config;
import android.graphics.Paint.Style;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		ListView listview = new ListView(this);
		
		MyAdapter adapter = new MyAdapter(this,aa);
		listview.setAdapter(adapter);
		
		LinearLayout main = new LinearLayout(this);
		main.addView(listview);
		setContentView(main);
	}
	
	String[] aa = {"22222222221","222222222222","3333333333"};
}

class MyListItem extends LinearLayout {

	TextView tv;

	public MyListItem(Context context,String text) {
		super(context);
		this.setOrientation(HORIZONTAL);
		tv = new TextView(context);
		tv.setText(text);

		addView(tv,new LinearLayout.LayoutParams(
				LinearLayout.LayoutParams.FILL_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT));
	}
}

class MyAdapter extends BaseAdapter {
	Context ctx;
	String[] array;
	public MyAdapter(Context ctx,String[] array) {
		this.ctx = ctx;
		this.array = array;
	}

	public int getCount() {
		return array.length;
	}

	public Object getItem(int position) {
		return null;
	}

	public long getItemId(int position) {
		return position;
	}

	public View getView(int position,View convertView,ViewGroup parent) {
		LinearLayout l = new MyListItem(ctx,array[position]);
		return l;
	}

}
} 

这样可以定制一个item，主要用于学习之用，还是建议能在xml中实现的尽量别用代码，因为维护xml文件相对容易很多

（编辑：李大同）

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